package com.itheima.service;

import com.alibaba.dubbo.config.annotation.Reference;

import com.itheima.pojo.Menu;
import com.itheima.pojo.Permission;
import com.itheima.pojo.Role;
import com.itheima.pojo.User;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.stereotype.Component;

import java.util.ArrayList;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Set;

@Component
public class SpringSecurityUserService implements UserDetailsService {

    @Reference
    private UserService userService;

    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        //根据[用户名]查找[用户]对象
        User user = userService.findByUsername(username);
        if (user == null){
            //用户名不存在
            return null;
        }

        List<GrantedAuthority> list = new ArrayList<>();

        Integer userId = user.getId();
        //根据[user]取出[roles]对象
        Set<Role> roles = user.getRoles();

        for (Role role : roles) {
            //为用户授予角色
            list.add(new SimpleGrantedAuthority(role.getKeyword()));
            Set<Permission> permissions = role.getPermissions();
            for (Permission permission : permissions) {
                //为用户授权
                list.add(new SimpleGrantedAuthority(permission.getKeyword()));
            }
        }

        org.springframework.security.core.userdetails.User securityUser =
                new org.springframework.security.core.userdetails.User(username, user.getPassword(), list);

        return securityUser;
    }
}
